PMID:15632310

Citation	Kim, KS, Sim, S, Ko, JH, Cho, B and Lee, Y (2004) Kinetic analysis of precursor M1 RNA molecules for exploring substrate specificity of the N-terminal catalytic half of RNase E. J. Biochem. 136:693-9
Abstract	To gain insight into the mechanism by which the sequence at the rne-dependent site of substrate RNA affects the substrate specificity of Escherichia coli RNase E, we performed kinetic analysis of the cleavage of precursor M1 RNA molecules containing various sequences at the rne-dependent site by the N-terminal catalytic half of RNase E (NTH-RNase E). NTH-RNase E displayed higher K(m) and k(cat) values for more specific substrates. The retention of single strandedness at the rne-dependent site was essential for cleavage efficiency. Moreover, the loss of single-strandedness was accompanied by a decrease in both the K(m) and k(cat) values.
Links	PubMed Online version:10.1093/jb/mvh176
Keywords	Endoribonucleases/genetics; Endoribonucleases/metabolism; Escherichia coli/enzymology; Genetic Variation; Kinetics; Nucleic Acid Conformation; RNA Precursors/chemistry; RNA Precursors/metabolism; RNA, Catalytic/genetics; RNA, Catalytic/metabolism; RNA, Messenger/genetics; RNA, Messenger/metabolism; Recombinant Proteins/genetics; Recombinant Proteins/metabolism; Substrate Specificity; Time Factors
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